If you are porting existing FTN95 code from 32 bits to 64 bits then you can continue to use any Silverfrost INCLUDE files that are in your code. There is no requirement to change to corresponding USE statements.

The change is only needed when porting ClearWin+ for use with a third party compiler. Third party compilers will not understand Silverfrost INCLUDE files so the change would be needed in that context.